HeliBoard 4.0-beta1

* add background gesture data gathering * add file / image functionality to clipboard history * add floating keyboard * add Unicode 17.0 emojis * add separate scale settings for foldedable phones * add touchpad mode on space slide * add option to disable spell checker suggestion popup * change autocorrect confidence to a slider * add key gaps width slider * distribute toolbar keys evenly * fix security issue when restoring backup from manipulated zip file * and more fixes and improvements...